相关疑难解决方法(0)

我使用 Ubuntu Linux。当我尝试使用“usleep”函数时，我得到有关“函数 usleep 的隐式声明”的信息。下面是错误代码：

muteks.c:70:4: warning: implicit declaration of function \xe2\x80\x98usleep\xe2\x80\x99 [-Wimplicit-function-declaration]\n    usleep(300);\n    ^\n

源代码：

#include <stdlib.h>\n#include <stdio.h>\n#include <time.h>\n#include <pthread.h>\n\nvoid * klientWatek (void* arg);\npthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;\nstatic int lKf = 10;\nint lKl = 15;\n\nint main ()\n{\n        pthread_t *klientTab;\n        int *klientTabId;\n        int lKr = 1;\n        int i;\n        // pami\xc4\x99\xc4\x87 dla identyfikatora w\xc4\x85tku\n        klientTab = (pthread_t *) malloc (lKl* sizeof (pthread_t));\n        klientTabId = (int *) malloc (lKl*sizeof (int)); //pami\xc4\x99\xc4\x87 dla id\n        // b\xc4\x99d\xc4\x85cego argumentem przekazywanym do  funkcji\n        for …